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"I used to believe that being a good soldier meant doing everything they told you. That's how they engineered us. But we're not droids. We're not programmed. You have to learn to make your own decisions."

Throughout his career, Rex proved to be an effective leader who truly cared for the men under his command, even as he began to doubt his own future—and those of his clone brethren—in the Republic. His leadership was put to the ultimate test at the Battle of Umbara, when he was forced to lead the 501st Legion under the obstinate and aggressive Jedi General Pong Krell, a secret Separatist agent. Rex's experiences with Krell forced him to reappraise his rigid adherence to orders, however this had not been the first time Rex had questioned his purpose and orders. A notable example had been during the Battle of Saleucami, when he allowed the clone deserterCut Lawquane stay out of the war. Rex used his combat skills and training to help train local insurgents on Onderon to emancipate their world. Rex's faith in the Republic was sorely tested by events such as the framing of Tano and the murder of his long-time comrade Fives, who had gone rogue after unearthing an anti-Jedi directive that had been bred into all of the Republic's clone troopers.

"Come on Rex, admit it. You've thought about what your life could look like if you were to also leave the army. Choose the life you want.""What if I am choosing the life I want? What if I'm staying in the army because it's meaningful to me?""And, how is it meaningful?""Because I'm part of the most pivotal moment in the history of the Republic. If we fail then our children, and their children, could be forced to live under an evil I can't well imagine."

―Cut Lawquane and Captain Rex talking in the second year of the Clone Wars[src]

Rex participated on the Battle of Arantara. At some point, Rex was found wounded and unconscious by General Anakin Skywalker. After been found, Rex was suprised to see Skywalker come back for him to which Skywalker responded that it should have been him in his place and that a leader always lead from the front.[15]

Some time after the Battle of Arantara,[15] Rex accompanied Skywalker, Kenobi, Cody and the rest of the Republic forces in their effort to liberate Christophsis from Confederate forces under General Whorm Loathsom and Dooku's assassin, Asajj Ventress. The captain took part in setting up an ambush on the approaching Separatist forces, but watched on as Kenobi and Cody were ambushed themselves. Skywalker rushed to his master's aid, with Rex and his men alongside. Fleeing to the rooftop, they held off the battle droids until evac arrived in the form of a gunship, with clone trooperGus removing the commanding tactical droid's head before departing. Rex then assisted Cody in performing a robolobotomy on the droid's head, discovering that it contained all of their intelligence. Surmising that this meant there was a spy in their midst, Jedi Generals Skywalker and Kenobi departed to investigate the Confederate headquarters, hoping this would reveal the spy's identity. Rex and Cody were instructed to conduct their own search at the Republic base.[16]

Rex fighting on Christophsis.

As they were leaving the command center, Cody noticed that someone had left their comlink on; their entire conversation had just been broadcast to the Separatist spy. Rex spotted someone in the corridor, and he and Cody gave chase. However, they lost him in the busy mess hall. They now realized the spy was a clone. Unable to reach the Jedi as a result of blocked communications, Rex had R2-D2 analyze the communication history to see if anyone had sent out any unauthorized transmissions. He noticed irregular wavelengths that were too low and infrequent to be detected normally, wavelengths that were coming from SergeantSlick's barracks. They proceeded to question Slick's men, all of whom had an alibi except Chopper, who lied about collecting battle droid fingers. However, Slick slipped when he revealed that he knew the Jedi were gone. Slick escaped, and managed to evade Rex and Cody while also blowing up the nearby weapons depot as well as many of the LAAT gunships and AT-TEs.[16]

Following a lead from Gus and Chopper, Rex and Cody ventured back to the command center. There, they noticed boot prints which trailed up towards the vents. Without a word between the two of them, Rex and Cody devises a trap; Rex pretended to leave the room, while Cody stood with his back to Slick's hiding spot as well as his gun. Slick slid out of the vents and points the gun at the back of Cody's head, but is shocked to learn that the blaster was empty as Cody took the clip out beforehand. After a short fist fight, Rex and Cody were able to subdue Slick, just as the Jedi returned from their fruitless trip to the Separatist headquarters. Skywalker verbally rebuked Slick for placing his brothers at risk, and Slick replied with a attack on the Jedi's enslavement of his brothers, the clones. Despite Slick scorching the entire weapons depot, Rex and Cody noted that they were able to save the heavy cannons.[16]

Rex met Ahsoka Tano on Christophsis.

As Loathsom's droid army moved in on their positions, Rex and his men accompanied Skywalker as he took on the tri-droids. Soon after, Rex met Skywalker's new apprentice, Ahsoka Tano, laughing as she calls Skywalker "Skyguy," which for laughing he was told to show her the ropes as a commanding officer, offering her advice and valuable leadership experience. He also stated that while she may outrank him, it's experience that outranks everything. Before long, Rex spotted the deflector shield being used by the incoming Confederate forces, rendering their cannons useless.[3]

After conferring with Kenobi, Cody and Rex, Skywalker, and Tano left to destroy the deflector shield, while Rex assisted Kenobi in holding back the droids before they were able to destroy the heavy cannons. As Kenobi lead a charge against the droids, Rex and his men drew the droids into the buildings, making the fight more manageable for the clones. Despite this, most of Rex's unit was wiped out, and he was soon ordered to pull back his forces in order to protect the cannons. As Kenobi delayed Loathsom with a drawn-out surrender, Rex noticed the shield drop just in time and ordered the cannons to finish off the tanks, ending the battle.[3] The battle itself would prove to only be the beginning of the long partnership between Rex, and what would prove to be tightly knit group of Jedi consisting of Kenobi, Tano, and Skywalker, and through this partnership Rex would learn his opinions were valued.[17]

Rex with Skywalker, Tano and several other clones at the base of the mountain

Rex, alongside Skywalker, Tano, and the rest of Torrent Company, then went to Teth to rescueJabba the Hutt's son, Rotta. They used their ascension cables to climb the cliffs to the monastery under fire from two droid battalions. Rex and his men secured the monastery. After Skywalker and Tano found Jabba's son, Vulture droids attacked as two Separatist landing craft landed, deploying more battle droids under the command of Ventress. Rex and his men retreated into the monastery.[3]

Rex and his men stayed behind to keep the battle droids busy. After Ventress cut the door's lock, Rex and his men fought the droids, but the droids subdued his men. Rex picked up his pistol and tried to shoot Ventress, who disarmed and Force-strangled him, demanding the location of Skywalker. Rex refused, but Ventress used a mind trick to make him contact Skywalker. However, by breaking protocol and calling Skywalker by name, Rex alerted him that Ventress was coming.[3]

When Skywalker contacted Rex, a battle droid came over, and Rex punched it and took its weapon. Rex and his troops then fought the droids guarding them. As they were surrounded, help arrived from Kenobi and Cody. After destroying a spider droid with a detonator, Rex told Skywalker they could take care themselves and that the mission came first. Rex then went with Kenobi, Yoda, and Cody to pick up Skywalker and his apprentice from Jabba's palace on Tatooine.[3]

After the Republic fell back to their camp, Rex spoke with several of his troopers about the location of the droids' shield generator. Knowing that it was a suicide mission, Rex decided to call in and exfil shuttle to pull his men out. Rex decided to undertake the mission by himself, but was followed by one of his troopers and Representative Binks. Rex then attacked and fought the battle droids for several hours until he was shot and pushed to the ground. He was saved by Representative Binks, who used Tik's lightsaber. Despite saving his life, Rex took Tik's lightsaber and gave Binks a blaster. The two of them continued to fight the droids.[15]

Rex told his fellow clones that their current battle was not only for the Republic, and this battle was for their fellow clones on Kamino.

Rex then went with Cody on a inspection tour on the Nu-class transport, Obex. After inspecting the tracking station at Pastil, Rex and Cody then went to the Rishi moonstation. En route, Rex contacted station. Rex noticed something odd about the trooper's reluctance to their inspection. After landing, Rex and Cody were greeted by another trooper who said that the base was fine and asked them to leave. Rex then demanded to be taken to the sergeant in command after the disguised droid said "roger roger". When the survivors of the station launched a droid attack flare, Rex realized that the clone trooper in front of them was actually a droid and promptly shot it in the head, much to Cody's surprise. Rex told him to relax and removed the clone trooper's helmet, revealing it to be a BX-series droid commando. They then came under attack by more commando droids that cut them off from the Obex. Rex and Cody then jumped off the platform as the commando droids threw detonators at them. They then used their ascension cables to climb down.[13]

They then met the surviving troopers, Fives, Hevy, and Echo, who at first they ordered to remove their helmets to prove they weren't droids. After removing their helmets, they came under attack by a Rishi eel, but Rex was able to shoot in the eye. Rex then marked Echo with the eel's blood and realized that they were "shinies", clones that had not fought before. He wanted to show them a taste of battle and brought them back up to the platform. As they did not have the equipment to bypass the blast doors, Rex devised a plan to act as a malfunctioning droid commando; Cody believed that the plan was absurd, but Rex managed to persuade the droids inside to open the door. After the droids opened the door, Rex, Cody and the rest of the clones then stormed the command center, taking out the commando droids. They then spotted a Confederate fleet approaching, but were unable to contact the Republic.[13]

When a landing craft came down, Rex said they would blow up the station so that the Republic fleet would arrive to investigate. Rex then rigged the gas detonators as Cody and others held up the battle droids. However, the remote detonator was not working. Rex and the others then left while Hevy fixed the detonator. However, Hevy refused to leave intending to set the gas off manually. Rex and the others then tried to go back for him but Hevy blew up the station along with himself. Rex and the others were rescued by a gunship. After Echo and Fives received medals for their bravery, Rex accepted them into the 501st Legion.[13]

Rex, Tano, and Skywalker receiving the report about Falleen from Kenobi.

After the loss of the Falleen battle group, Rex, Skywalker, Tano and their fleet were sent to protect Bothawui. Rex and the fleet's AT-TEs were then deployed on the asteroids surrounding Bothawui. As General Grievous's fleet moved in to attack Skywalker's fleet, Rex and the AT-TE opened fire on the rear of the enemy fleet. Rex saved Skywalker when his fighter was damaged, then stayed with Ahsoka as Skywalker searched for Grievous's spy station. When Rex and Ahsoka detected Skywalker's tracking signal, they took the Twilight and rescued Skywalker from Grievous's forces.[18]

Rex then assisted Skywalker in his search for the listening post. After receiving a message from R2, Rex, Denal, and his squad accompanied Skywalker in destroying the station in the Ruusan system. Rex also carried R3-S6 down to the station. Rex, Ahsoka, R3 and the rest squad were then sent to destroy the station's reactors while Skywalker searched for R2. However, R3 slowed them down leading to a confrontation between super battle droids. They were able to subdue the droids, however, Rex, Ahsoka and the squad were then confronted by General Grievous. Rex and his squad tried to shoot, but all were killed except for Rex and Denal. As Rex was about to be killed, he was saved by Ahsoka. Rex and Denal were then ordered by Ahsoka to complete their mission without her. Rex and Denal were then able to rig the reactors and rendezvous with Skywalker and the Twilight in the landing bay. However, Rex and Skywalker then realized that R3 was a spy when he summoned super battle droids and vulture droids to attack them. Rex then destroyed the reactors and they were then joined by Ahsoka and made their escape, with Skywalker rescuing R2.[19]

Later during the conflict, Rex joined Skywalker, Tano, AdmiralWullf Yularen, and several other clone troopers on a mission to the planetQuell where Jedi General Aayla Secura and her clone commander, Bly, were fighting against a Separatist opposition. With Secura's cruiser damaged, the Republic forces were in a hurry. After breaking through a line of rocket super battle droids, they landed on Secura's ship, where Skywalker was injured in an explosion on the exploding ship. With fellow troopers Cameron, Flash, and Lucky, Rex, Tano, Secura, Bly, and Skywalker escaped on a transport vessel. However, they were then hit and entered hyperspace. Their ship then crash-landed on the planet Maridun.[20]

Rex then stayed behind to look after Skywalker while Secura, Bly, Ahsoka, and the other troopers went to look for help. Rex then fought against the Mastiff phalones alongside Skywalker until Bly, Ahsoka, and the Lurmen healer Wag Too came to his aid. Rex and his fellow clones and Jedi quickly discovered that Maridun was home to a Lurmen village.[20]

Rex then watched for any spacecraft hoping for rescue. Rex soon spotted a Confederate landing ship coming toward the village. He informed Bly of this and then made their escape from the village before the battle droids arrived. Rex and the others then planned to steal a shuttle, but were then spotted by a recon droid. They then pursued it until Secura destroyed it. Rex and the others then watched as General Lok Durd prepared to test his weapon. Rex went with Bly to get a closer look at the weapon. Rex and Bly then ran to avoid the weapon's shockwave using their grapnel lines.[21]

After Durd left, Rex worked with Bly and Skywalker to infiltrate Durd's base, where they were able to steal a shuttle and shield generators. Rex and the group then returned to the village, where Skywalker, Bly and him built a wall to withstand, much to Tee Watt Kaa's disapproval. Rex and Bly then activated the shield as the Defoliator Tank fired its weapon. Rex and the others then stood their ground until the droids breached the shields and destroyed it. Luckily, Rex, Bly and the others then had help from the Lurmen and were able to subdue and capture Durd. As Rex was taking Durd, Republic cruisers then arrived to rescue them.[21]

Rex then accompanied Generals Kenobi, Skywalker, Pantoran Senator Riyo Chuchi and Chairman Chi Cho to Orto Plutonia. There, they investigated Glid Station to ascertain what happened to the troopers. Rex and the Jedi then went to Confederate outpost, where they saw a hologram of a creature attack the battle droids. Rex then returned to the station, where he and his troops waited for the Jedi's return. Rex and his troops then went with the Jedi, Chairman Cho, and Senator Chuchi to speak with the Talz Chief, Thi-Sen at the Confederate base. After the meeting was over, Rex was then charged with protecting the Chairman when he decided to attack the Talz. Rex, his troopers, Cho, and his guards were then surrounded by the Talz. When Cho was mortally wounded, Rex and his men retreated, carrying the Chairman with him. Rex then formed a defense line near a cliff and held out until Skywalker, Kenobi, Chuchi and the rest of the troops arrived.[9]

Rex, Tano, and several others stopped the droids from unleashing the virus.

Rex was then sent to Naboo to assist Skywalker and Kenobi to stop Confederate scientist, Dr. Nuvo Vindi, from deploying bombs laden with the Blue Shadow Virus. Rex then fought alongside Commander Tano in fighting their way through Vindi's lab. They were able to stop Vindi's droid from unleashing the virus.[22]

However, LEP-86C8 was able to steal a vial and trigger one of the bombs, contaminating the labs. Though Rex and his troopers were able to seal the lab, they were infected with the virus. Alongside SenatorPadmé Amidala and Binks, they were able to destroy all the droids but were also infected with the Blue Shadow Virus, and stop them from unleashing it on Naboo. Fortunately, Skywalker and Kenobi were able to administer a cure to them and save them.[23]

Rex, along with Skywalker, Tano, and Yularen then took the Resolute and their fleet to Ryloth to break the Confederate blockade. After their failed first attack, Rex and Skywalker gave Master Windu their progress report. After telling Tano that Skywalker wished to speak with her about their next attack, he oversaw the evacuation of the Defender. After Skywalker left Tano in command of the Resolute, Rex and one of the navagation officers worked with her to plan a way to eliminate the remaining blockade forces. At first, Rex and the officer were worried that Tano's maneuver would not work, but went along when Yularen agreed to it. After Skywalker destroyed the confederate command ship, Rex, Yularen and the navigation officer maneuvered the Resolute into the attack position. They then watched as Tano and her bombers destroyed the remaining forces. Rex then sent a ship to pick up Skywalker's and R2's pod as Kenobi's and Windu's forces landed.[24]

Rex, Cody, Kenobi, Skywalker, Tano, and their forces eventually found themselves First battle of Felucia combating the droid army on the strategic planet of Felucia. Republic forces became based in a jungle clearing, and Tano was tasked with a jungle patrol to combat the Separatist forces. As Tano lead her troops against droid forces, the droid army located and surrounded the Republic position. Republic forces were soon overwhelmed, and their only hope for survival became a group of Republic gunships called to evacuated them under the command of General Plo Koon. As droid forces surrounded Rex and the others, Koon, his starfighters, and his gunships were able to fight through the Separatist blockade. The ships were followed to the planet by Separatist vulture droids, and the destruction and crash of one of the droid starfighters altered Rex and the others to the arrival of the gunships. The clones fired at the approaching droids as Rex and the other Republic leaders lead them to the ships. Rex called for all troops to leave, and after all forces boarded they went to locate Tano's position. Tano did not want to leave, and she said the Separatists were retreating. Skywalker argued that the droids were regrouped and about to overrun her as Rex and the others did their best to fight out the droids. Skywalker ordered for her and her clones to evacuate, and as all Republic forces lifted off the regrouped droid army decimated Tano's abandoned vehicles.[25]

Rex and his troops were able to get a shuttle for the group to escape in.

Rex then went with Skywalker and Tano to Devaron to stop Bane from taking the Kyber memory crystal from Master Bolla Ropal. Rex then gathered three brigades to board Bane's ship. Rex then approved of Skywalker's idea of using the AT-TEs to board Bane's ship. Rex, Skywalker, Tano and their troops were successful in boarding the ship, though they did not save Master Ropal in time. Rex and the others then found Bane on the gun deck. Rex and his men fought the battle droids while Skywalker and Tano pursued Bane. They then secured a shuttle and waited for Skywalker and Tano to return. When they returned, Rex watched as Denal shot Bane.[26]

After returning to the Resolute, one of Rex's men then spotted blood. Rex told Skywalker the blood was not from one of his men. Rex and Skywalker then realized that Denal was actually Bane in disguise, but he made his escape.[27]

Rex then fought with Skywalker, Tano, and his troops when the Republic returned to Geonosis. After Skywalker's gunship were shot down, Rex and the others continued towards Kenobi's position on foot. Rex then assisted Skywalker and Tano in taking out a droid fortress blocking their path. After the fortress was destroyed, Rex, Skywalker, Mundi, Tano and the rest of their forces were able to rendezvous with Kenobi and Cody.[28]

Rex then fought alongside, Skywalker, General Unduli, and Commander Gree and their troops to distract Poggle's forces while Tano and Barris Offee infiltrated the droid foundry. At first, they were able to drive back the battle-droids. However, Rex, Gree and their troops were forced to fall back when Poggle sent in Super tanks to finish them off. After the foundry was destroyed, Rex brought in their tanks and gunships to search for Tano and Offee.[29] Rex then saw Tano and Offee leave to recuperate.[30]

Rex then accompanied Skywalker, Kenobi, Unduli and Mundi to deliver Poggle to Coruscant. Rex then stayed alert when Tano and Offee failed to check in time. Rex was then able to contact Tano and informed Skywalker of this.[31]

Rex and several of his troopers investigated the remains of Grievous' landing ship. Rex then took Jesse, Hardcase, and Kix through the wet lands to find Grievous. However, Rex was then shot by commando droid sniper. He survived, but needed a bacta patch and to be left behind at a farm to recover. He discovered that the owner of the farm was a clone deserter named Cut Lawquane. At first, Rex was disgusted by Lawquane's lack of commitment to the Republic. Despite this, Rex accepted his children's invitation to dinner. Rex then talked about how he would stay in the Army, no matter what happened. Cut told Rex why he left the army, as during his squad had been ambushed and killed off; as the only survivor, he fled. During the night, Cut's children accidentally reactivated a pod of disabled commando droids, so he and Cut defended the house from them; Cut saved him from one of them. The next morning, Rex prepared to leave, stating that he did not see Cut as a coward anymore and would not report him to the Republic. He then rejoined Kenobi's forces.[10]

Rex with the other Republic forces aboard the Coronet receiving orders from Kenobi.

Rex, Cody and their troops were then briefed on the importance of protecting the Duchess. They then stayed in the cargo bay. Rex then saw that R2 was spooked by something and that 2 of his troopers were missing. Rex, alongside Skywalker, then found an open container. They then continued the search until Skywalker was attacked by a Assassin probe. Rex and Cody were then able to take it out. However, they then came under attack by Probe killers. After defeating them, Rex and Cody continue their search taking out the last probe killer. Rex was then attacked by the last assassin probe but was able to hold off its claws before Skywalker took it out. Rex then fought off super battle droids boarding the Coronet alongside Cody, their troopers, and the Duchess' royal guards.[34]

When Ahsoka Tano was chosen by the Jedi High Council to teach students at the Royal Academy of Government to help break the cycle of corruption on the planet, Rex accompanied Skywalker and Tano to the planet. While the two Jedi spoke with Duchess Satine and Prime MinisterAlmec, Rex and another clone trooper stood by their ship. After Skywalker took Tano's lightsaber, due to a recent law passed that no offworlders could bring weapons to Mandalore, Rex approached Skywalker, and Rex informed him that it was time for them to go. Skywalker departed the planet for a meeting with Jedi Master Kit Fisto, and Tano stayed on the planet to teach her class about corruption, and when on the planet she helped uncover a conspiracy lead by Almec.[35]

In an attempt to force Pantora to join the Confederacy of Independent Systems, members of the Trade Federation loyal to the Separatists, such as administratorSib Canay, arranged the blockade of Pantora. In order to push Pantora closer to the CIS the daughters of the Chairman of Pantora, Papanoida, were kidnapped. During the debate around the blockade, Rex stood with Anakin as he spoke with Padmé Amidala. Amidala told Skywalker how the situation reminded her of the blockade Naboo had went under, and Ahsoka Tano then ran up to the group. Tano informed them that the daughters of Chairman Papanoida had been kidnapped, but despite this development Skywalker mentioned that the Jedi could not get involved. Skywalker, however, also told Tano that due to the Separatist involvement she could technically investigate on her own, but he would have to make sure the Jedi Council did not find out. Amidala asked if it was a good idea to go against the wishes of the Jedi Council, and Skywalker only responded that they did it all the time. This was all discussed while Rex was with them.[36]

Ahsoka Tano watches as Anakin Skywalker and Captain Rex prepare to leave on a Nu-class transport for Balith.

When the planet Balith fell into a large-scale civil war, the planet requested Republic assistance. Rex and Skywalker were to help the Third Legion on the planet, but Tano was to stay behind on Coruscant to give a full report on recent events. As they were departing Tano argued that she should go with the group, but Skywalker countered said that she had to finish her studies. Rex and Skywalker then departed for Bailth on a Nu-class transport.[37]

Rex, Cody and their troopers then returned to his homeworld of Kamino when a message between Grievous and Ventress was discovered. Rex and Cody then joined Fives, Echo, 99 and several young cadets in the barracks. Together, they fought off the battle droids, but 99 was then killed. Following the battle, Rex promoted Echo and Fives to ARC troopers.[38]

When Master Piell was captured, Rex alongside Cody, Fives, Echo, Kenobi and Skywalker attended a briefing held by Plo Koon for a mission to rescue Piell from the Citadel on Lola Sayu, where he was imprisoned by the Separatists. In order to get on the planet undetected, Skywalker had the entire rescue team, including Rex, carbon-frozen. The frozen team was smuggled by R2-D2 and some reprogrammed battle droids in a stolen Separatist shuttle. This tactic successfully fooled the life-form scanners of the blockade around the planet and its crew and the droids landed the shuttle in a cave close to the Citadel prison. After landing, Rex and the others were unfrozen, only to discover that Ahsoka Tano had secretly joined the team, despite having received orders not to do so. Since there was no other option, Ahsoka came along and the team began the mission.[39]

Rex with Tarkin during the escape

In order to get in the facility the team had to free climb a wall covered with electromines. This went well until a clone trooper stepped on a loose rock and fell straight into a mine, alerting the prison crew of the team's presence. On the way to Piell's cell the team had to evade several booby traps, one killing another clone trooper. The team made it to Piell's cell and destroyed the droids that were guarding Piell, with Rex taking care of the interrogator droid. On the way to rescue Piell the group was located by the Citadel's warden, Osi Sobeck, who activated a large magnet in the ceiling of the hall that pulled all the team's weapons away, as well as Skywalker, due to his cybernetic arm. The team was surrounded by droids.[39]

Skywalker, being attached to the magnet, reclaimed his lightsaber and destroyed the magnet, allowing the team to reclaim their weapons and destroy the droids. Rex shot a surveillance camera, much to Sobeck's frustration, before moving along. After retrieving Piell's officers the group decided to split up in two groups while escaping the facility, as both Piell and his captain, Tarkin, knew half of vital hyperspace coordinates, called Nexus Route. By splitting them up during the escape it would be more difficult for the Separatist to get the full information. Rex joined the group consisting of Skywalker, Tano, Tarkin, Echo, Fives and two rescued clones. While Kenobi and the other group wreaked havoc on the upper levels, Rex and his group escaped the tower into a series of tunnels on the lower levels.[39]

Rex and the others then made their way through tunnels fighting off the super battle droids and commando droids. He also defended Ahsoka when Tarkin questioned her experience. They were then able to meet up with Kenobi's and Piell's team at the airfield. However, their shuttle was destroyed[40] and ARC trooper Echo was believed to have been killed.[41]

Rex and the others then made their to a rendezvous point as they were pursued by STAPs and Anoobas. During their trek, Piell was killed by one of the anoobas and Rex and the others gave him a brief funeral. They then reached the rendezvous point, where they fought against Commander Sobeck and his droids until Koon arrived. Rex and the others were then taken back to Coruscant.[42]

Rex then went with Skywalker, Ahsoka, Koon, Wolffe, and their men to take out a resupplied Separatist outpost. With the aid of Felucian scouts, Rex and Skywalker assaulted the outpost while Tano and Koon attacked the outpost from the sides. However, Skywalker noticed that Ahsoka had gone missing. Rex and his men then searched the outpost and the surrounding area for her to no avail.[43]

Rex, along with Skywalker, Fives and the rest of the 501st were then sent to Umbara to help Masters Tiin, Krell and Kenobi to take it's capital, while Tano and Offee fought the space battle. After the initially landing and fighting with the Umbaranmilitia, Rex and the 501st were then place under the command of Krell when the Chancellor requested Skywalker to return to Coruscant. Rex and his men were then pushed hard by Krell, who pushed for full frontal assaults on the capital. During the first attack on the road to the capital, Rex was forced to retreat, much to Krell's disappointment.[12]

Rex, Krell, and the 501st were then sent to capture an airbase that was resupplying the capital. Rex was then ordered to go through a gorge that would leave them exposed. Rex tried to reason with Krell to no avail. Despite the objections of Fives and the rest of the 501st, Rex convinced his men to carry out Krell's orders. As they made their way through the gorge, they were attacked by the Umbarans' crawler tanks. Fortunately, Rex and his troops were able to destroy the crawler tanks. They were then confronted by the Umbarans' MHCs, which had heavy armor impervious to their rocket launchers. To combat them Rex sent Fives and Hardcase to infiltrate their base and use their own Zenuas 33 Umbaran starfighters on the MHCs. Despite Krell's orders to push the attack, Rex and his men were able to hold them off until Fives and Hardcase destroyed the MHCS. The base was then taken and secured despite the heavy losses.[46]

Rex and many of his men did not agree with Krell.

When Kenobi contacted them about the capital's long range missiles being supplied by a DH-Omni Support Vessel, Rex proposed that they should attack the ship to cut off the supplies. However, Krell proposed to attack the capital despite the missiles, much to Rex's and Kenobi's surprise. Rex was then ordered to prepare the men for the attack, despite the heavy casualties. Rex at first complied, but was then told of idea by Fives to use the Starfighter codes to infiltrate and destroy the supply ship. However, Krell objected to it. Following a mishap in a hangar, Rex then gave Fives, Jesse, and Hardcase permission to carry the mission. However, he told them that if they were caught, he would not be able to protect them. Rex then watched as they took off on their mission and stopped Dogma and Tup from informing Krell. Krell then confronted Rex, who told him that he authorized a reconnaissance mission to make his strategy more efficient. Rex the saw the supply ships explosion. Rex, Fives, and Jesse were then brought before Krell, where he reprimanded them. Despite Rex's objections, Krell had Fives and Jesse taken to the brig for insubordination.[47]

Rex leading the 212th and the 501st to arrest General Krell.

Rex then spoke with Krell to convince him to spare Fives and Jesse, telling him that the men are with him despite his reckless tactics. Despite this, Krell ordered Rex and his men to execute them, but they refused to do so. Rex and Krell were then contacted by a trooper who informed them that they were ambushed by the Umbarans disguised as clones. Rex was then sent to attack the Umbarans. Rex and his men, armed with mortars, then went into the jungle where they were attacked by the troopers. However, Rex then examined one the troopers and discovered they were clones. Rex then ran in front of both his men and the troopers, revealing the deception. Rex then spoke with the 212th Attack Battalion platoon leader, Waxer, who revealed that it was Krell who ordered the attack before dying of his wounds.[48]

Krell's execution

Rex then gathered his men and the remainder of Waxer's platoon together. Then, Rex told them that they would arrest Krell for treason. Rex and the men then confronted Krell, who was surprised that he had figured it out. Krell, believing him to be committing mutiny against, refused to be arrested. Krell then pushed Rex and his men and made his escape into the jungle. Rex and his men then went into the jungle, where Krell taunted him. Fortunately, Krell was then subdued and stunned by Tupp. Rex and his men then placed Krell in the brig. During his questioning, Rex learned that Krell was trying to undermine the Republic so that Dooku or his master would make him his new apprentice and rule Umbara. When news came that Kenobi and 212th had taken the capital, Rex and the others decided to execute Krell. At first, Rex hesitated but Krell was then killed by Dogma. Dogma was then taken into custody, while Rex gave him a reassuring nod for doing the right thing.[48]

Ten rotations after Master Yoda last communication with Kiros' governor, Roshti, Rex, along with Skywalker, Kenobi, Ahsoka, and their men were sent to free Kiros from the Separatist occupation forces. Rex then rode with Kenobi as his gunner on his BARC speeder. Rex then finished off the last of the AATs with his rocket launcher as they approached the Separatist headquarter inside the governor's tower.[49]

Following the capture of Commander D'Nar, Rex went with Skywalker, Kenobi, and Ahsoka to Zygerria using the Tecora.Rex, disguised as a Zygerrian guard, went with Kenobi to find the colonists. Rex was then able to spot Governor Roshti. Rex then attempted to escape with Kenobi and Roshti, but they were then captured. Rex then went to slave auction still posing as a guard. When Skywalker was able to whip Kenobi, Rex saw his signal and attacked the guards. However, he and the others were then captured. Rex, Kenobi, and Roshti were then taken to Kadavo, to its slave processing facility.[50]

There Rex worked in the facilities' mines alongside Kenobi and the Togrutas as a slave. He and Kenobi were then brought before "Keeper" Agruss, who was ordered by Count Dooku to execute them. However, Rex and Kenobi were able to free themselves when Skywalker, Tano, and Plo Koon came to free the slaves. Rex then killed Agruss. Rex and Kenobi then made their way to a gunship and left the facility before it was destroyed.[51]

Following the battle, Rex was assigned by Skywalker to guard the Supreme Chancellor against bounty hunter Moralo Eval's kidnapping plot. He covered for Skywalker and Tano when they went after Eval, Bane and Rako Hardeen.[52]

Rex then went with Kenobi, Skywalker, and Tano to Onderon to help train its rebels in fighting the Confederacy's occupation forces. Rex taught them how to use weapons such as the droid poppers against the battle droids.[53] Rex then left with Skywalker and Kenobi to report on the Rebels progress against the Confederate forces in Iziz.[54]

Rex and Commander Fox disagreed about Ahsoka Tano during the hunt for her.

Rex was with Skywalker and Tano when they defendedCato Neimoidia from the Confederacy.[55] Rex then returned to Coruscant, where he worked with Skywalker to prove Tano's innocence in the Jedi Temple bombing and Letta Turmond's murder. He then went with him to the military base, where Commander Fox told him that Tano killed several clones. Rex, Skywalker, and Fox then searched for her. Rex then followed Skywalker to a tunnel, where they witness Tano escaping from them.[56] Rex then assisted Skywalker, Koon, Commander Wolffe and a team of shock troopers in searching for Tano.[57] Tano was ultimately proven innocent, but she left the Jedi Order.[58]

Rex participated in the Invasion of Scipio, a battle in response to the Separatist invasion of the InterGalactic Banking Clan planet of Scipio, which had been considered a neutral world. While General Anakin Skywalker and other members of the 501st Legion made their initial descent on the planet, Skywalker requested that Rex determine the location of Senator Padmé Amidala, who was on Scipio due to the exchange of power in the banks from the corrupt leaders to Rush Clovis. Rex said he could not pinpoint her exact location, but that the initial scan indicated she was still alive. Upon reaching the planet's surface, Skywalker ordered Rex to hold the line as he searched for Amidala. Rex, along with the rest of the 501st, successfully held their position and regained control of the planet from the Separatist forces.[61]

"From Anakin I expect this type of disregard for authority, but Rex I'm surprised you would be involved in such a reckless plan.""Actually sir this mission was my idea. If Echo's alive and being held hostage, we can't just leave him there."

―Obi-Wan Kenobi and Rex discuss the Mission to Skako Minor to rescue Echo[src]

After the Separatists Admiral Trench made advances against Republic forces during the Battle for Anaxes, Rex theorized that the Separatists had captured his comrade Echo, who was presumed dead, and that they were forcing him to divulge his strategy algorithm. In order to test his theory, Rex and Commander Cody joined forces with an elite squad called Clone Force 99 (known as the "Bad Batch"); which consisted of Sergeant Hunter, the assault specialist Wrecker, the sniper Crosshair, and the tech specialist Tech. The clones raided a Separatist cyber center on Anaxes and discovered that it was receiving an audio signal from Skako Minor that was beeping Echo's clone trooper number. This confirmed Rex's suspicions that Echo might still be alive.[62]

Armed with this information, Rex traveled to Skako Minor with Clone Force 99 and Anakin Skywalker on the Havoc Marauder. After landing, Skywalker was kidnapped by a large flying reptile called a keeradak which deposited him in a Poletec village. Rex and the Bad Batch traveled to the Poletec village where they managed to make peace with the villagers and convince them to release Skywalker. With the aid of Poletec scouts, the clones and Skywalker traveled to the Techno Union city of Purkoll. During the journey, the clone troopers traced Echo's signal. When Crosshair suggested that Echo had become a traitor, Rex vouched for his friend and fought with Crosshair. Anakin broke up the fight and counselled him to be ready for such a situation. Rex accepted Skywalker's concerns but insisted on dealing with Echo himself.[41]

The clones managed to trace Echo's signal to a tower and infiltrated it. Inside, they received a hologram message from the Techno Union leader Wat Tambor who announced that he had used the algorithm to lure them into a trap. When Tambor charged them with violating the Techno Union's neutrality, Rex responded that Tambor had already breached the Union's neutrality by bringing a Republic prisoner to Skako Minor. Tambor sent several D-wing droids to attack them but the clones and Skywalker defeated them. Rex and Tech managed to force their way inside a stasis chamber and find Echo. Echo was alive but many of his body parts had been replaced with prosthetics and he was kept in an induced coma. Rex and Tech proceeded to free him.[41]

Rex and Tech managed to free Echo from the chamber after some difficulty. However, the clones and Skywalker were surrounded by Techno Union forces and unable to call for help since they were on an unsanctioned mission. When Tambor dispatched an Organic decimator to destroy the intruders, Rex, the other clones, and Skywalker managed to flee through an exhaust pipe. Wrecker then planted several detonators which destroyed the Organic decimator and the chamber. While crossing a pipe, the clones and Skywalker managed to escape on four winged Keeradaks and return to the Poletec village.[63]

At the village, the clones, Skywalker, and the Poletec villagers joined forces to destroy several D-wing droids and octuptarra tri-droids that Tambor had dispatched after them. During the battle, Rex managed to disable one octuptarra by firing into its eye sensor. Following the battle, the Poletec chief praised the courage of the clones and Skywalker. Rex also commended Echo for his bravery during the battle. The clones and Skywalker then headed back to Anaxes.[63]

Rex and Echo

After returning to Anaxes, Echo devised a plan which involved infiltrating Admiral Trench's dreadnought and feeding the Separatist systems with false information in order to secure a Republic victory on Anaxes. Rex, Echo, Skywalker and Force 99 infiltrated Trench's warship using the Havoc Marauder while Republic forces under Jedi Generals Windu and Kenobi attacked the Separatist assembly plant. The clones and Skywalker infiltrated the dreadnought's interface unit and fed false information to Admiral Trench. Echo brought all Separatist forces to the assembly plant and then used a feedback pulse to shut them down.[64]

When Admiral Trench realized the deception, he activated a time bomb in the factory's fusion generator. Rex and his fellow clones managed to fight their way through several battle droids and return to the Havoc Marauder. Meanwhile, Skywalker killed Admiral Trench while Mace Windu used the Force to deactivate the bomb with the help of information supplied by Echo. Rex, his fellow clones, and Skywalker then fled Trench's dreadnought before Wrecker detonated it. At Fort Anaxes, Rex along with Echo and the Bad Batch attended a ceremony where they were awarded for their recent actions. Due to the Republic victory, Anaxes was able to continue producing warships for the Republic Navy.[64]

In the final years of the Clone Wars, Rex joined fellow troopers, including Cody and Jesse, to a mission to prove the redemption of the Jedi Master Quinlan Vos. Once the clones began to unload equipment, it was discovered that the asteroid they were on was about to explode. Quickly, the Jedi and clones escaped the asteroid, thanks to Vos. However, the Jedi was simply fooling all of them and was still an agent of Count Dooku.[65]

Sometime later, Ahsoka Tano came into contact with the Jedi Order and requested the help of the Jedi in retaking the planet. Skywalker and Kenobi traveled to Mandalore, but were forced to return to Coruscant as ChancellorPalpatine had been kidnapped by General Grievous.[68][69]

Skywalker was able to leave Rex and a battalion of clones on Mandalore to aid in the capture of Darth Maul. During the height of the Battle, Chancellor Palpatine had issued Order 66, resulting in the clones turning on Tano, and allowing Maul to escape. However Rex had removed his inhibitor chip before Order 66 was issued, sparing him from being forced to turn on Tano. Eventually, Tano and Rex escaped and managed to fake their deaths before leaving the planet to live in exile.[68]

"Well my name's Ezra. This is Kanan. That's Sabine and Zeb. It's nice to meet you, 7567.""Actually my name is Rex. Captain. 501st clone battalion. Meet Commanders Gregor and Wolffe.""We were sent by Ahsoka Tano.""Ahsoka Tano. I fought by her side from the Battle of Christophsis to the Siege of Mandalore, and a friend of hers is a friend of mine."

Rex and his comrades' first encounter with the Ghost rebels almost ended in violence when Kanan thought the clone troopers were a threat and ignited his lightsaber. Rex's timely intervention managed to break up the fight between his comrades and Kanan. When Kanan's apprentice Ezra mentioned that he and his rebel companions had been sent by Ahsoka, Rex quickly realized that the rebels were friends and introduced himself and his companions. While meeting with the rebels inside the walker, Ezra tried to convince Rex and his companions to join the fight against the Empire. Rex laughed and declined, saying that his days as a soldier were over. After discussions with Kanan, Rex agreed to create a list of bases that the rebels could use but invited the four rebels to participate in a hunt for joopas as payment for supplying them with this information.[4]

To allay Kanan's distrust of clone troopers, Rex revealed that he, Gregor, and Wolffe had managed to remove their control chips. The rebels reluctantly participated in the joopa hunt with the LasatGarazeb Orrelios acting as both the "hunter" and the "bait." Zeb was swallowed by the joopa but succeeded in killing the creature. Having completed their side of the deal, Kanan wanted his rebel companions to leave but Rex invited them to stay for dinner. While dining, the Mandalorian teenager Sabine Wren discovered that Wolffe had secretly alerted the Empire to their presence and hid the messages that Ahsoka had sent them.[4]

Wolffe, who distrusted the Jedi, had informed the Empire in the mistaken belief that he was protecting himself and his fellow clones. Rex was shocked by this revelation and confronted Wolffe. He managed to convince Wolffe that the rebels were their friends and that the Empire was their enemy. Shortly later, the clones and rebels were visited by an Imperial probe droid which damaged their auxiliary ship, the Phantom; preventing them from rendezvousing with their fellow crew aboard the Ghost, which was waiting in space. After destroying the probe droid, Rex and his companions prepared for the arrival of the Empire.[4]

Ahsoka Tano and Rex embrace after years of being apart.

Despite Ezra's efforts to encourage Rex and his companions to join the Rebellion, Rex was adamant that the clones would stay behind to hold back the Empire while the rebels escaped on the Phantom. A force of AT-AT walkers led by the Imperial Security Bureau agent Kallus, a perennial foe of the Ghost crew, landed on Seelos. Despite being outnumbered and outgunned, Rex and his fellow clones stood their ground. At the urging of Ezra, the rebels intervened in the fight and managed to defeat the Imperials. Without air support, Kallus and his surviving AT-AT pilots were forced to retreat into the desert. Honored that Kanan and Ezra would return to save them, Rex and his comrades saluted the Jedi and agreed to join the Rebellion. Hera then arrived with the Ghost to pick them up. Later, Rex met with his old friend Ahsoka in space.[6] Meanwhile, Gregor and Wolffe stayed behind and turned the remaining AT-AT into their new home.[70]

After joining the Rebellion, Rex became part of the Phoenix rebel cell, which operated a fleet in space. During one of Ezra's levitation lessons, Rex exposed Sabine and Chopper's trick that involved locking the astromech droid Chopper's feet to the floor, preventing Ezra from levitating him. When Ezra was upset about the trick, Rex told the young Padawan about how a Jedi General he had once fought alongside became a great warrior by combining the Force with his wits. In response, Kanan told Rex that the boy had a lot of wits but needed more discipline.[71]

While Rex and Kanan argued about how to train Ezra, the young Padawan sneaked away with Sabine, Chopper, and Zeb on a mission to salvage supplies from an Old Republic medical base. Rex had provided the rebels with the codes to this station. Unknown to the rebels, two Inquisitors known as the Seventh Sister and the Fifth Brother were waiting for them. The rebels barely escaped with their lives. Rex was present with Kanan and Hera when the younger rebels returned with news that the Empire had more Inquisitors.[71]

Later, Rex oversaw target practice with Ezra, who was using a DC-15A blaster to try and hit a stormtrooper helmet that Chopper was moving around. Kanan came out, sternly reminding Ezra about his Jedi training, which sparked a minor debate between Rex and Kanan until Sabine informed them that Hera had called for a mandatory group meeting. The rebels then participated in a mission to scour Garel City for power generators and Fuel Cells to alleviate an energy crisis on the planet Rinn.[72]

An opportunity for Rex to resolve his differences with Kanan Jarrus arose after Ezra Bridger and CommanderJun Sato's CR90 corvetteLiberator were captured by an Imperial Interdictor during a mission to the Del Zennis system. Prior to their capture, Sato had managed to warn the other rebels that the Empire had a new warship capable of pulling ships out of hyperspace. Under the orders of Phoenix Leader Hera, Rex along with Kanan and Chopper were to infiltrate the Imperial warship and rescue Bridger and Sato. For this mission, Rex and Kanan were to disguise themselves as stormtroopers while Chopper was painted black to mimic an Imperial communications droid.[73]

When Kanan expressed unease about working with Rex, he reassured him that he knew which side he was on. After Zeb brought two captured sets of stormtrooper armor, Rex complained that the new armor was junk compared to the armor he had worn during the Clone Wars. For their mission, Rex, Kanan, and Chopper used a stolen Sentinel-class landing craft to travel to the Del Zennis system, which they learned had been classified by the Imperial authorities as a restricted testing area. While traveling through hyperspace, the two men argued about their mission. While Kanan wanted to find their people and get them out of Imperial custody, Rex insisted on disabling the new ship as well since it could pose a threat to the Rebellion.[73]

Upon approaching the Imperial Interdictor, Rex managed to con the Imperial scanners by telling them that his shuttle was having engine problems. Using emergency protocols he and Commander Cody had invented, they managed to gain permission to dock in the Imperial Interdictor. After landing, Kanan used a Jedi mind trick to convince the stormtroopers guard in the hangar to let them through. Accessing a terminal, they learned through Chopper that Ezra was being transferred to a secure cell; meaning that the Empire had learned his identity. Disguised as stormtroopers, the three rebels made their way to Ezra's cell only to discover that the young Jedi had already broken free and locked his captors in his holding cell.[73]

Rex and Kanan reveal themselves to Ezra.

Mistaking Rex and Kanan for stormtroopers, Ezra stunned them with his lightsaber-blaster. When Rex and Kanan recovered, Ezra tried to save face by claiming that they had been involved in a big fire fight. Chopper however played a holographic recording of what actually happened. While Kanan was furious, Rex laughed it off and suggested that Ezra should have set his blaster to kill in case if was not them. When Rex and Kanan broke into an argument about whether to limit their mission to rescuing their rebel comrades or destroying the ship as well, an irritated Ezra broke off and accompanied Chopper on a mission to sabotage the Imperial Interdictor's gravity well projectors.[73]

Disguised as stormtroopers, Rex and Kanan continued their mission to rescue their rebel comrades. When they stumbled on a stormtrooper patrol, Rex advised caution but Kanan decided to attack them. During the firefight, Rex complained that he could not see through his stormtrooper helmet and threw it at one of his opponents, knocking him out. After braving heavy fire, Rex and Kanan finally reached the detention cell holding Commander Sato and his crew. They then decided to make their way back to Commander Sato's CR90 corvette Liberator. On the way, they were attacked by more stormtroopers. Rex decided to buy his rebel comrades more time by holding off their pursuers and locking the blast doors.[73]

Rex then took on the remaining stormtroopers in single-hand combat only to be stunned. Captured, Rex was brought before the Interdictor's commanding officer, Admiral Brom Titus. Recognizing Rex based on his code number, Titus tried to win Rex over by offering him immunity and reinstatement at an Imperial Academy if he would convince his compatriots to surrender. However, Rex rejected Titus' terms and the Admiral ordered an interrogator droid to torture him to death while two stormtroopers pinned him down over a round portal. Meanwhile, the other rebels managed to reach Sato's corvette safely. After hearing Rex being tortured through the Force, Kanan decided to rescue Rex.[73]

Before Admiral Titus could finish Rex off, Kanan entered the command bridge disguised as a stormtrooper and opened fire on Titus' men. After freeing Rex, the two men escape on an escape pod and boarded Commander Sato's corvette. They then attempted to flee into hyperspace but were again pulled out by the Imperial Interdictor. However, Chopper had rigged the Interdictor's gravity well projectors to draw in everything nearby including two escort light cruisers. These light cruisers crashed into the Interdictor; destroying it in a fiery explosion. Rex and the other rebels managed to escape into hyperspace in the nick of time. Following their escape, Commander Sato praised Rex, Kanan, and Ezra for rescuing him and his crew. Rex also thanked Kanan, who had managed to finally overcome his animosity towards Clone troopers. As a gesture of reconciliation, the two men saluted each other before they parted company.[73]

Due to an accidental leak by Ezra Bridger on Takobo, the Seventh Sister and the Fifth Brother learned that the Phoenix rebel cell was hiding on Garel. The two Inquisitors informed their Imperial colleagues Agent Kallus and Admiral Kassius Konstantine, who sent an Imperial fleet from Lothal to attack Garel City. During the escape, Rex was with Commander Sato when their CR90 corvette was caught in the tractor beam of the Imperial Star DestroyerRelentless, Konstantine's ship. However, Phoenix Leader Hera managed to free Rex and Sato by using the Ghost to ram into the Star Destroyer's tractor beam projector. This enabled the remaining Phoenix rebel ships to escape into hyperspace.[74]

Rex was present during a meeting with Commander Sato and the crew of the Ghost to discuss the establishment of a new hyperspace route to the Lothal sector. With the Empire hunting them down throughout the Outer Rim, the rebels were in need of a new hyperspace route that would allow them to bypass Imperial forces. During the meeting, Sabine suggested that the rebels try penetrating the Concord Dawn system, which was home to a Mandalorian colony known as the Mandalorian Protectors. Rex advised his fellow rebels that the Mandalorians who inhabited the planet Concord Dawn had helped train clone troopers during the Clone Wars. At the end of the meeting, the rebels decided to send a diplomatic mission led by Hera, the leader of Phoenix Squadron, to negotiate for safe passage with the Protectors.[75]

Hera's diplomatic mission failed since the Protectors led by Fenn Rau had aligned themselves with the Empire. Under Rau's orders, the Protectors' Gauntlet fighters engaged Hera's RZ-1 A-wing interceptors in a vicious dogfight above Concord Dawn. Several rebel A-wings were destroyed and Hera herself was badly injured. Following the dogfight, Rex was present during a briefing where Sabine, one of the survivors, gave a report of the dogfight with Fenn Rau. Rex recalled that Rau had served as an instructor in the Grand Army of the Republic. With Commander Sato's permission, Kanan along with Chopper and Sabine took part in a mission to destroy the Protectors' starfighters on the third moon of Concord Dawn.[75]

Rex using the Ghost's forward laser cannon to clear the station's hangar of AT-DPs.

Rex later accompanied the crew of the Ghost to investigate an Imperial construction module above the planet Geonosis. As a veteran of the Clone Wars and a participant of the second battle that took place on the planet, Rex was aware that Geonosis was home to billions of Geonosians. Thus, he was surprised when Chopper picked up no sign of life on the planet. Ezra then sensed through the Force that all life on Geonosis had been extinguished. Upon landing in the seemingly abandoned module, Rex stayed aboard the ship with Hera and Chopper while the other rebels went to explore the station. Shortly later, they discovered that they had stumbled into a trap set by the Imperial Security Bureau Agent Kallus.[76]

While Rex helped Hera to man the Ghost's defences against Imperial All Terrain Defense Pod walkers, Chopper managed to free the other rebels by unlocking the blast doors from the control console. Rex and the other rebels managed to escape the Imperial module aboard the Ghost. However, Zeb was separated and escaped in an escape pod with Kallus. After escaping Imperial TIE fighters, Rex and his fellow rebels began looking for Zeb. Despite sweeping through the system, they were unable to find Zeb which led Rex to remark that the Lasat had a slim chance of survival.[76]

Meanwhile, Zeb and Kallus landed on Bahryn, one of Geonosis's moons. After working together to fight off Bonzami predators, the two struck an unlikely friendship. Zeb was able to activate his transponder and the crew of the Ghost were able to rescue him. Rex and the other rebels except Chopper greeted Zeb at the ship's gangplank after landing on Bahryn.[76]

Later, Rex and several other rebels including Commander Sato, the Spectres, and Ketsu Onyo, Sabine's friend, attended a briefing aboard the rebels' captured Imperial fighter carrier to discuss their plans to set up a new rebel base. By cross-referencing several Republic and Lothalian star charts, the rebels had identified the planet Berzite's moon as a prospective candidate. Since the rebels' fighter carrier were low on fuel, Ketsu recommended stealing fuel from the Imperial depot at Horizon Base.[77]

As a result of the meeting, Commander Sato sanctioned a mission by the Spectres to steal fuel from Horizon Base. Rex stayed aboard the rebel flagship during the Imperial attack on the Phoenix rebel fleet. After Chopper and the former Imperial inventory droidAP-5 relayed information about an Imperial trap in the Yost system, Rex accompanied the rest of the Phoenix rebel fleet to Atollon; a safe world with no Imperial presence.[77]

Following the discovery of Atollon, Rex was placed in charge of the establishment of Chopper Base on the planet. From the base's command centre, Rex commanded operations to deliver shipments to the base and to establish sensor beacons that would serve as warning beacons for intruders. While Rex found the planet hot, dry, and unpleasant, he conceded that there was nothing trying to kill them. Later, he and Wren venture to the base's northern perimeter to investigate the disappearance of LieutenantDicer, who had disappeared after planting her sensor marker.[78]

Under Hera's orders, Rex and Wren traveled there on the shuttle Phantom. Upon arriving, they found Dicer's helmet but saw no sign of the rebel. Shortly later, the two rebels were attacked by several large spidery creatures called krykna. Wren managed to hold off the creatures, but Rex was taken captive. The krykna carried him down to their underground lair where he was held in the mandibles of a sleeping krykna which hung suspended from the top of the cavern. Sabine and the Spectres managed to free him but were pursued back to the surface by the krykna.[78]

Rex and his companions managed to make it back to the Ghost but the starship was held down by a large web woven by the krykna. As the rebels fought to break their way out of the web, Rex and Chopper aided in the defense of the ship by fighting off a krykna intruder trying to breach the rear hatch. While Rex kicked and pushed the creature out, Chopper closed the rear doors. After escaping the krykna, Rex suggested reporting to Commander Sato that the base was unsafe. However, Syndulla responded that they had poured much effort into finding the base and should not give up. At Jarrus's suggestion, the rebels erected a fence consisting of sensor markers around the base the following day.[78]

Rex kept in contact with Ahsoka Tano as she traveled with Bridger, Jarrus, and Chopper to the planet Malachor to seek answers on how to defeat the Sith. Holding Tano in high regard, Rex offered to come to her aid within two rotations. Tano declined the offer and reiterated that this mission was Jedi business. When Tano joked that she outranked Rex, he replied that experience always outranked everything. Tano then replied that she had more experience than him due to her experiences during the Clone Wars and Jedi Purge. Rex remained at Chopper Base for the duration of the Jedi mission to Malachor.[79]

In Rex's absence, the Jedi and Tano came into conflict with the Inquisitors and forged a tenuous alliance with the former Sith apprentice Maul to obtain a Sith holocron which purportedly contained the knowledge needed to defeat the Sith. After destroying the Inquisitors, Maul turned on the Jedi and blinded Kanan with his lightsaber. Later, the Sith Lord Darth Vader arrived and the Jedi and Chopper managed to flee but Ahsoka chose to stay behind.[79]

Following the mission, Rex and the other Spectres were later present on the runway when the Phantom landed at Chopper Base. They watched in silence as Jarrus, now blind, and Bridger disembarked from the ship. When Rex saw that Tano was not with them, he bowed his head in sadness at the thought of having lost a good friend.[79]

After Ezra and his team rescued the WeequaypirateHondo Ohnaka from the Imperial prison at Naraka, Rex attended a briefing where Hondo shared information on the Imperial floating junkyard Reklam Station inside the planet Yarma to the Phoenix rebels and Spectres. After Hondo revealed that the Imperials were dismantling Old Republic Y-wing starfighters there, Rex told his fellow rebels that the Y-wings were reliable combat fighters. In the end, the rebel leadership agreed to dispatch a recon mission to Reklam Station.[80]

Rex accompanied Ezra's team and Hondo on the Phantom to Reklam Station. On the way, the rebels exited hyperspace at Sereeda Waypoint where they were intercepted by a Mining Guild patrol. After escaping the Mining Guild patrol, the rebel team continued their journey to Yarma. While traveling inside Yarma's gassy atmosphere, the Phantom was pursued by two Imperial DTS-series Dismantler Droids. While Chopper shot down one, Rex opened the Phantom's rear hatch and fought with the second dismantler droid. He almost fell out but was pulled back into the ship by Zeb. In the end, Rex managed to shoot the droid but the Phantom sustained damage. Fortunately for Rex and his team, Sabine regained control of the ship.[80]

After parking the Phantom beneath the station, Rex and his team managed to convince the local Ugnaught laborers to help them steal the Y-wings in return for their freedom. After stopping the conveyor belt, Rex and the other rebels began refueling the starfighters. Rex commented that refueling the fighters would not be their first nor last complication. After the Imperial Commander Brom Titus activated the magnetic locks on the Y-wings, Rex and Ezra departed to attack the Imperial control tower. Rex was forced to return when a third dismantler droid attacked Chopper, Sabine, and Zeb.[80]

Rex used a magnetic crane to trap the dismantler droid against a metal container before pushing it down into Yarma's volatile depths. The dismantler droid then erupted in flames. After Ezra cut off the station's power, Rex and the other rebels departed on the Y-wings. Chopper used the relay navigation system to remotely pilot the other craft. Rex then traveled in the same Y-wing as Chopper and the rebels escaped into the space above Yarma. The rebel Y-wings were intercepted by an Imperial Star Destroyer commanded by GovernorArihnda Pryce. However, they were saved when the Phoenix fleet arrived with the fighter-carrier Phoenix Nest and evacuated the fleet. Due to the efforts of Rex and his team, the Phoenix rebels obtained five Y-wings which were then transferred to GeneralJan Dodonna's unit.[80]

Facing a shortage of supplies, Rex, Kanan, Ezra, Chopper and Zeb traveled to Agamar to obtain proton bombs from a wrecked Separatist supply ship that had crashed on the planet during the Clone Wars. After landing on Agamar, Rex took the opportunity to tell the other rebels about his Clone Wars experiences. When Ezra opined that the B1 battle droids did not look dangerous, Rex responded that these droids had killed many of his friends. Rex and the other rebels soon found the munitions depot and discovered that it was full of proton bombs. Before they could proceed further, they were trapped in a ray shield and stunned by several battle droids led by B1-268.[11]

After awakening, Rex and his fellow rebels found themselves prisoners of the super tactical droidKalani. Kalani informed the rebels that he presumed the master control shutdown command issued to the Separatist Droid Army at the end of the war to be a Republic trick, and prevented it from disabling his battalion. Despite Rex insisting that the Clone Wars had ended and demanded that he and his friends be released. Kalani refused, stating that he would have one last battle; a victory for the Separatist Alliance. Zeb was the only one excluded from the battle on account that his species had not been involved in the Clone Wars. Though Rex, Kanan, and Zeb expressed their opposition to the war game, Ezra managed to strike a bargain with Kalani. If the rebels managed to make it back to the command center, Zeb would be free and they would take all of the proton bombs in the hangar. Kalani accepted these terms, and the "simulation" began.[11]

Unknown to the rebels or the Separatists, Chopper had evaded the battle droids and sent a distress call through a Neimodian escort shuttle. However, the Empire picked up the distress signal, and Governor Pryce gave the order for the nearest Imperial fleet to deploy forces on Agamar to wipe out the rebels. Back outside the supply ship, Rex, Kanan and Ezra began the "simulation" as a large force of battle droids marched on their position. Utilizing a "sword and shield" maneuverer whereby Rex would fire and the Jedi would deflect incoming shots, as well as using two thermal detonators to wipe out large sections of the droid attack wave, the trio made short work of the first group of battle droids. They managed to reach the hangar bay only to find that Kalani had deployed three droidekas to intercept them.[11]

Unable to breach the droidekas' deflector shields, Rex and the rebels were forced to retreat. Rex and Kanan then agreed to provide covering fire while Ezra headed into the hangar to collapse a catwalk over the droidekas. Ezra was delayed by an unexpected reunion with Chopper but still managed to collapse the catwalk with the Force. Meanwhile, Rex was hit in the chest by a blaster bolt from a battle droid but survived due to his Clone trooper armor. While continuing their mission to the command bridge, they encountered Ezra. Rex chastised Ezra for his tardiness and warned him that one soldier's move affected everyone else in the team. In Rex's view, they needed discipline and strategy to succeed. Kanan counseled Ezra not to take the Clone trooper's words personally because Rex was determined to finish the battle.[11]

After Rex knocked out another droideka with his helmet, the rebels managed to enter Kalani's command center and declared victory. However, Kalani disagreed on technical grounds and prepared to execute Rex. Before any further violence could break out, Ezra interceded and convinced the two sides to put aside their differences. After Imperial forces landed on Agamar and attacked B1-268 and a battle droid patrol, Ezra managed to win over Kalani to their side by pointing out that the Empire was the successor to the tyranny of the Old Republic. Kalani accepted Ezra's logic and agreed to help the rebels formulate an escape plan.[11]

Rex: "No, it was a victory. We all just won the Clone War, and you ended it Ezra. A galaxy of senators couldn't do that. An army of Jedi, clones, and droids couldn't find the middle ground, but you did."

Ezra: "Rex, all I did was point out that none of you were meant to win. You couldn't."

Working together, Kalani, Rex, and the rebels improvised a strategy which involved rolling the proton torpedoes onto the feet of the advancing Imperial AT-AT and AT-DP walkers. When Kalani admitted never attempting such a desperate strategy, Rex responded that was why the Clone troopers won; prompting Kalani to reply "not always." After knocking out one of the AT-AT walkers, the rebels and droids fled aboard three Neimoidian escort shuttles while under fire from the Imperial walkers. One of the shuttles was shot down but the rebels' and Kalani's shuttles managed to escape into space.[11]

Once in space, Rex and the rebels corresponded with Kalani by hologram. When Kalani opined that their joint effort was a successful strategy but not a victory, Rex opined that it was a victory and thanked Ezra for finding a middle ground that allowed the clones and droids to end the Clone Wars. Both Rex and Kalani also accepted Ezra's explanation that both sides could not win the Clone Wars. Despite departing on friendly terms, Kalani thought that the rebellion had a poor chance of success and parted for parts unknown. Rex and the other rebels were later contacted by Hera. Despite not obtaining the proton bombs, they managed to acquire a new transport for the Ghost.[11]

Rex and the Phoenix Squadron took part in a mission to evacuate rebel sympathizers from the planet Mykapo prior to an Imperial crackdown. After the Ghost and a local rebel cell called the Iron Squadron destroyed an Imperial advance patrol, Rex and the crew of a Sphyrna-class corvette evacuated the rebel sympathizers to safety. Rex contacted Hera and Kanan to inform them that he would be rendezvousing with the rebel fleet. Later, Rex corresponded with Hera and her crew by hologram while discussing a plan to rescue the Iron Squadron captain Mart Mattin from Imperial forces. This mission was ultimately successful and Mart managed to reunite with his uncle Commander Sato.[81]

Rex along with the Spectres and other members of Phoenix Squadron attended a briefing chaired by Hera Syndulla to discuss a planned strike against the Imperial Armory Complex on the planet Lothal. During the meeting, Ezra saw the former Sith apprentice Maul sneak past Rex. Using the Dark side of the Force and NightsisterMagick, Maul haunted Ezra and caused him to faint. As a result, Hera proceeded on the Lothal mission without Ezra.[82]

Rex later accompanied the crew of the Ghost on a mission to find Saw Gerrera and investigate the apparent disappearance of the Geonosian species on Geonosis at the request of Senator Bail Organa; a key ally of the rebellion. Rex explained to the Spectres that he and Saw had fought as allies during the Clone Wars. He also warned his fellow rebels to be worried about what Saw did not find on Geonosis. The rebels landed near the Geonosian structure that Saw had last entered before losing contact with Rebel Command.[83]

While exploring an underground labyrinth, Rex along with Kanan, Ezra, and Chopper found several discarded helmets belonging to Saw's team. Kanan and Chopper wanted to leave but Ezra and Rex were determined to find Saw and to complete their mission. After reaching a dead end, the rebels were cornered by several battle droids and a droideka. Before the battle droids could finish off the rebels, Saw arrived and eliminated most of them with a grenade.[83]

After greeting his former comrade in arms, Rex and his fellow rebels agreed to help Saw find the lone Geonosian, who had ambushed and killed his group. Saw believed that the Geonosian held the key as to why the Empire had wiped out the entire population of Geonosis. Rex, the Spectres, and Saw eventually reached the central air shaft. After Kanan contacted Hera to warn about the operational battle droids, the rebels discovered the lone Geonosian on the other side of the shaft.[83]

While Ezra and Chopper pursued the Geonosian, Kanan used the Force to levitate Rex and Saw on a stone bridge over to the other side. Following a protracted pursuit, Rex and his comrades managed to capture the Geonosian. While Saw was hostile to the Geonosian due to his animosity towards the Separatists, Ezra managed to befriend the Geonosian, who was nicknamed "Klik-Klak." While making their way to an energy reading picked up by Chopper, Rex explained that Saw was still affected by the death of his sister Steela Gerrera at the hands of the Separatists.[83]

The rebels soon discovered that the source of the energy reading was Klik-Klak's nest, which contained a working transmitter. While Rex and Chopper worked to establish contact with Hera, Saw and Ezra argued about Klik-Klak; who revealed that he was the custodian of the last Geonosian queen's egg. While Saw wanted to interrogate Klik-Klak offworld, Ezra insisted that Klik-Klak belonged on Geonosis since he was one of the few surviving members of his species. When Saw expressed his dislike for the Geonosians, Rex reminded him that his mission was to find out what had happened to the Geonosian species. In the end, Kanan brokered a compromise which involved bringing Klik-Klak to Chopper Base for interrogation and returning him to Geonosis once they had finished with him.[83]

After establishing contact with Hera, the rebels arranged to rendezvous with her at the central air shaft. After boarding the Ghost, Rex and the Spectres became involved in an argument with Saw over the treatment of Klik-Klak. Saw broke his agreement with Kanan and demanded that the rebels let him leave with Klik-Klak and the Geonosian egg. During the argument, Saw electrocuted Klik-Klak with an electro-shock device, which prompted Ezra to lunge at him. Rex tried to restrain Saw but the other rebel knocked him to the ground. When Saw threatened to destroy the Geonosian queen egg, Rex reminded him that doing so would sully the memory of his sister.[83]

The rebels' argument was interrupted by the arrival of an Arquitens-class command cruiser commanded by Captain Brunson. Rex and his fellow rebels and Saw joined forces to repel a boarding party of Jumptroopers. During the skirmish, Rex used the Ghost's laser cannon to blast several of the Jumptroopers. The Ghost then fled into the depths of Geonosis. There, the rebels and Saw discovered several Imperial poison canisters which the Empire had used to exterminate the Geonosians. Having found compelling evidence of the Imperial genocide, Saw experienced a change of heart and let Klik-Klak flee with the Geonosian queen egg into the depths of Geonosis.[83]

The rebels then fought their way out of the air shaft by blasting Brunson's light cruiser with proton torpedoes. They then informed Senator Organa and Commander Sato about their successful rescue of Saw, their acquisition of a deflector core, and their discovery of the Imperial genocide against the Geonosians.[83]

After the rebels learned that Grand Admiral Thrawn was monitoring the rogue ISB Agent Kallus's Fulcrum transmissions, Rex took part in a rebel mission to rescue Kallus before the Empire captured him. As part of the mission, Ezra, Chopper and AP-5 stole a shuttle from the planet Lothal's Capital City spaceport and allowed themselves to be captured by Kallus' Imperial light cruiser, which was captained by Lieutenant Yogar Lyste. Disguised as stormtroopers, Rex and Kanan then traveled in the Sentinel-class landing craft TY997 to Lyste's light cruiser to facilitate the extraction.[84]

The rebel mission was complicated when Grand Admiral Thrawn requested an audience with Kallus and Lieutenant Lyste aboard his Imperial Star Destroyer Chimaera. After reaching the Chimaera, Chopper informed Rex and Kanan about the change of plans. While Rex expressed shock, Kanan told Chopper to get them a fresh set of coordinates for the Chimaera since their current coordinates would only work on the Imperial light cruiser. Chopper complied and managed to obtain the new set of coordinates with the help of Kallus and Ezra.[84]

After exiting hyperspace, Rex and Kanan discovered Thrawn's Seventh Fleet orbiting Lothal. When Kanan asked which ship, Rex told him to transmit the coordinates at random. TY997 was cleared for landing aboard the Chimaera. However, Thrawn had discovered that rebel infiltrators were aboard the shuttle and sent Governor Pryce to apprehend the intruders. Pryce saw through their stormtrooper disguises and ordered Rex and Kanan to surrender. When Kanan protested, Pryce stunned him.[84]

Rex then shot one of Pryce's stormtroopers before fighting hand to hand combat with the Governor. Pryce managed to overpower Rex and knock him to the ground. However, Lieutenant Lyste, mistaking Pryce for Fulcrum, stunned her. Before Lyste could attend to Rex, Kallus tackled him to the ground. Rex and his fellow rebels then fled aboard their landing craft. Kallus opted to stay behind in order to continue helping the rebellion. He also framed Lyste as Fulcrum in an effort to draw attention away from himself but Thrawn was not fooled.[84]

Later, Rex along with Commander Sato and AP-5 were present at the Chopper Base command center when the former Imperial Senator Mon Mothma gave a live HoloNet speech denouncing the Empire and urging the galaxy to rise up in rebellion.[5]

After Ezra Bridger heard Kanan Jarrus' holocron and the Malachor Sith holocron warning that the Jedi Master Obi-Wan Kenobi was in danger, Rex attended a meeting with Bridger, Commander Sato, and the other Spectres including Phoenix Leader Syndulla. During the meeting, Rex expressed sympathy for Bridger's desire to find Kenobi, but believed that Kenobi had perished, citing a report from Senator Bail Organa. Bridger disagreed and traveled with Chopper on a mission to find Kenobi. Bridger found that Kenobi was indeed alive and that Maul was no longer a problem.[85]

Rex took part in the Battle of Atollon. Before the Phoenix Squadron and General Jan Dodonna's Massassi Group could launch a coordinate attack on the Imperial TIE Defender factories on Lothal, Grand Admiral Thrawn learned the location of Chopper Base and invaded the Atollon system. In response, Hera devised a plan to sneak Ezra and Chopper out of the system aboard the Gauntlet fighter Nightbrother while launching a frontal attack on Thrawn's Seventh Fleet. Prior to the battle, Zeb and Rex joked about hunting joopas with Rex remarking they were hard to hunt but tasty.[86]

During the space battle, Rex and Zeb manned the guns aboard the Ghost. After Commander Sato sacrificed his life and command ship Phoenix Nest by ramming Admiral Konstantine's interdictor vessel, Ezra and Chopper were able to escape and seek reinforcements from Clan Wren. However, the rebel forces sustained heavy casualties at the hands of Thrawn's fleet and were forced to retreat to Atollon. Rex and Zeb managed to activate Sabine's prototype deflector shield generator, creating an umbrella above Chopper Base and the remaining rebel ships.[86]

Despite the shield generator taking heavy damage, Rex and Zeb were pleased when the shields appeared to hold up. After Thrawn deployed ground forces, Dodonna theorized that Thrawn would send his forces through the narrow canyon leading to Chopper Base. Rex proposed guarding the passes, which Hera approved. Rex destroyed several of Thrawn's AT-DP walkers with detonators while Zeb destroyed the last one with a rocket launcher. However, the two rebels were forced to retreat when Thrawn deployed several AT-AT walkers, which were protected by shield generators.[86]

After reuniting with Kanan, the three rebels fled into the caves under the Atollon Coral Mesa and fought against Thrawn's death troopers and stormtroopers. After reuniting with Hera, General Dodonna, and AP-5, they tried to flee to the Ghost but were surrounded by Thrawn and his death troopers. Before Thrawn could take them prisoner, Kanan's mysterious friend Bendu, the enigmatic Force-wielder, unleashed a thunder storm which devastated the base. Rex and his rebel comrades fled aboard the Ghost and joined the rebel fleet in space.[86]

By that stage, Ezra had returned with Mandalorian reinforcements led by Sabine and Fenn Rau. The Mandalorians destroyed Thrawn's second interdictor cruiser, allowing the rebel remnants to flee into hyperspace. Under the orders of Hera, the rebel convoy set a course for Yavin 4. When AP-5 proposed doing two jumps to cover their tracks, Rex recommended a third jump.[86]

Following the Battle of Atollon, Rex and the other surviving members of Phoenix Squadron joined the Massassi Group, a Rebel Alliance unit based on the jungle moon Yavin 4. Rex, several Spectres, and rebel ground crew were present at the airfield outside the Great Temple when Hera's squadron of Y-wings landed. Since the fighters had sustained damaged, the Y-wings including Hera's starfighter had trouble landing. Rex remained on Yavin 4 while the Specters undertook a mission to destroy the Imperial relay on Jalindi.[87]

Later, Rex and the former Imperial Security Bureau Agent Alexsandr Kallus accompanied the Specters on an undercover mission to the Imperial-occupied planet of Lothal. Hera placed Rex in charge of looking after the Ghost while the Spectres infiltrated Lothal aboard Cikatro Vizago's freighter Broken Horn.[88]

Following the Spectres' mission to the Lothal Jedi Temple, Rex accompanied Captain Syndulla and Kallus on a trip to the planet Seelos to recruit several old friends of Ezra to assist in the liberation of Lothal. As the Ghost entered Seelos' atmosphere, Rex contacted his fellow Clone veterans Gregor and Wolffe; who had settled in a former AT-AT walker known as Joopa Base that was roaming G872.[89]

At Joopa Base, Rex and his rebel comrades encountered Gregor, Wolffe, the Weequay pirate Hondo Ohnaka, his Ugnaught companion Melch, and the Mandalorian bounty hunter Ketsu Onyo. Rex, Hera, and Kallus managed to recruit the group to participate in the liberation of Lothal as a favor to Ezra.[89]

While traveling back to Lothal, the rebels waited in space at Hondo's suggestion to catch a ride on an Imperial Class four container transport. As they waited, Rex doubted that Ezra and the others could hold out against Governor Pryce's forces. Shortly later, the container transport arrived and the rebels were able to latch the Ghost onto the ship. Upon arriving at the Lothal cliff dwelling, Rex along with Gregor, Wolffe, and Kallus help the other Spectres and Ryder's rebel forces to defeat Pryce's remaining troops and capture the Imperial Governor.[89]

Captain Rex participated in an operation to infiltrate the "Dome" alongside Wolffe, Gregor, and multiple other allies. The center of Imperial power on Lothal, the Dome was a mobile Imperial Planetary Occupation Facility that was equipped with thrusters. The rebels used two captured patrol transports to fly to the Dome. For the operation, Rex disguised himself as a stormtrooper. During the flight, Rex reassured a skeptical Gregor that Ezra's plan would work because he was a Jedi.[90]

With the help of an unwilling Governor Pryce, the rebels managed to land at the Dome's executive landing pad. Following a brief battle, the rebels managed to capture the command center. With the help of Ryder Azadi, the rebels issued a faux Protocol 13 which caused the Imperial garrison on Lothal to evacuate aboard the Dome. Before the rebels could launch the mobile base, Grand Admiral Thrawn returned aboard the Chimaera and blocked their path. Since Thrawn's NoghriassassinRukh and the Imperial forces had disabled the Dome's deflector shield generator, the Chimaera was able to bombard Capital City.[90]

Ezra managed to stop the bombardment by offering to surrender himself. When Zeb proposed using the Dome's cannons to blast the Chimaera, Rex advised against it since their weaponry was no match for the Star Destroyer's firepower. Despite Rex and Hera's objections, Ezra escaped on a patrol transport and went up to face Thrawn aboard the Chimaera. In Ezra's absence, the rebels endorsed Sabine's plan to recapture the north and south power terminals in order to restart the Dome's shield generators.[90]

Rex along with his fellow Team A members Hondo and Ketsu Onyo were assigned to the north power terminal. Despite fierce Imperial resistance, the rebels managed to reach the north power terminal after Ketsu used a manual override to extend the bridges. Sabine also aided Rex's team by sealing a blast door so that they could proceed with their mission to reactive the power terminal. When Hondo's Ugnaught companion Melch arrived with a stormtrooper hot in pursuit, Rex shot the trooper. Rex was distraught when his Clone comrade Gregor was shot in the chest while taking part in the assault to secure the south tower. After restarting the north power terminal, Rex attended to his fallen comrade. Gregor told him it was a pleasure fighting alongside him for a greater cause before dying in his arms.[90]

After Ezra summoned a pod of purrgil to carry him, Thrawn, and the Chimaera into uncharted space, Rex and the other rebels watched in shock in the command center. The rebels then launched the Dome into Lothal's upper atmosphere. As stormtroopers tried to storm the command center, Rex and the other rebels evacuated aboard the Ghost, which was being flow by Rex's fellow Clone trooper Wolffe, Mart Mattin, and Cikatro Vizago. Once safely airborne, the rebels detonated the Dome, wiping out the Imperial garrison on Lothal and ending Imperial rule on the planet.[90]

General Syndulla then told Rex to bring out every star chart along Ezra's last known trajectory. However, they received a pre-recorded message by Ezra telling him that he made a difficult decision and thanking the Spectres for being his family. Rex warned that the Empire would return to the planet, an assessment shared by former ISB Agent Kallus who hoped that the Rebel Alliance would finally send support. He and his allies decided to help defend Lothal but in addition to that he continued to work with the Rebel Alliance with General Syndulla. Despite Rex's fears, the Empire never returned to Lothal.[90]

"Next you're going to tell me that you weren't planning to mention Captain Rex, Ahsoka, Ventress, Cad Bane, Savage Opress, Jar Jar, and the Mandalorians?""Well.. I guess I could always go back and tell their stories later.""Out of order?"

Rex was remembered in the time after Galactic Civil War's Battle of Endor, and was mentioned by a member of the Whills, as someone to be remembered in galactic history. The Whill mentioned Rex and the others when they learned that the Whill tasked with writing about galactic history in the Journal of the Whills intended to start with the Galactic Civil War. The writer clarified Rex and the others stories would be told, but the other Whill protested that it was being done out of order.[91]

Rex was a Clone Captain who was produced from the template of the bounty hunter Jango Fett.[3] As with many of his fellow Clone troopers, Rex lived to serve the Galactic Republic[10] and to protect its citizens.[9] While he was eager to follow orders, Rex adopted a less rigid approach as the Clone Wars wore on.[12] During the Clone Wars, Rex would work alongside the Clone Commander Cody,[13] the Jedi Generals Obi-Wan Kenobi, Anakin Skywalker, and the Jedi Padawan Ahsoka Tano.[3] He was also loyal to his men and refused to believe that his comrade Echo had died or turned traitor.[41]

Rex would develop a friendship with the Padawan Ahsoka Tano and became her mentor, offering her advice and valuable leadership experience. Rex taught her that experience outranked everything.[3] When Tano was framed for murder and treason, Rex doubted that she had committed the crimes, but followed the order to arrest her. Despite this, the two would maintain a deep respect for each other after the Clone Wars and came to regard each other as friends. During the Age of the Empire, Rex would return a favor to his friend Tano by joining the rebellion. His knowledge of former Republic military bases,[6] combat skills, and military tactics would help the rebellion in its fight against the Galactic Empire.[73][75] He was deeply saddened when he learned about her presumed death on Malachor.[79]

While Rex initially had a difficult relationship with the Jedi Purge survivor Kanan Jarrus and argued over strategies and Ezra Bridger's priorities, the two put aside their differences following a mission to rescue Ezra and Commander Jun Sato from an Imperial Interdictor. Rex was staunchly loyal to the Old Republic and refused to recognize the authority of the Galactic Empire. Rex's fortitude led him to resist torture at the hands of the Imperial officer Brom Titus. He even regarded Imperial stormtrooper armor as inferior to the Clone trooper armor he wore during the Clone Wars.[73]

Rex in action during the Clone Wars.

Due to his Clone Wars experiences, Rex harbored a significant antipathy for battle droids.[11] However, he had a respectful relationship with the Lothal rebel's astromech droid Chopper.[76] His animus towards battle droids led him to reject Kalani's demand that Rex and his Jedi comrades Jarrus and Bridger take part in a reenactment of the Clone Wars. As a Clone trooper, Rex was bred to fight and wanted to finish his mission to destroy his battle droid opponents. However, Bridger managed to convince Rex and Kalani to put aside their past differences in order to fight against the Empire.[11]

Rex harbored considerable respect and loyalty to his former Clone Wars comrade Saw Gerrera, whom he had first met during the Onderon campaign. While Rex was unwilling to abandon his former comrade, he still expressed discomfort with some of Gerrera's harsh methods including brutalizing the Geonosian captive Klik-Klak and threatening to destroy the last Geonosian queen egg. Still, Rex was empathetic to Gerrera's pain and realized that his comrade was still grieving the loss of his sister Steela Gerrera. Rex's belief in the sanctity of life led him to fight with Saw, when the latter threatened to destroy the last Geonosian queen egg.[83]

Rex wielding his signature DC-17 hand blasters

Rex had a deep respect for Jedi Master Obi-Wan Kenobi due to their shared experiences during the Clone Wars. However, despite personally wanting to believe Kenobi was alive, he believed Bail Organa's word that the Jedi Master had perished by 2 BBY. Rex was proven wrong when Bridger encountered Kenobi during an errant mission to Tatooine.[85] Rex and his friend Zeb were known for their sense of humor even during difficult times. During the Battle of Atollon, they traded jokes about joopa and quipped about Sabine's prototype shield generator.[86]

By the time that the Spectres returned to Lothal, Rex had become acquainted with his former Imperial foe Kallus. General Syndulla placed Rex in charge of looking after the Ghost in her absence.[88] Rex used his knowledge of Gregor and Wolffe's whereabouts to help Ezra find them, Ketsu, Hondo, and Melch in order to recruit them for Ezra's mission to liberate Lothal.[89] Rex later used his military experience and combat skills to help the rebels capture the Dome during the Liberation of Lothal. As a warrior, Rex believed that the rebels needed to be on guard should the Empire return to Lothal.[90]

"I know someone who might be able to help us. A great military commander with a vast knowledge of the Outer Rim. He could assist us in finding a base, and his experienced leadership would make him a powerful ally."

Rex favored his Phase II helmet, but donned his Phase I armor for durability.

Rex was a skilled military commander and a respected leader who won the respect of his men and peers.[4] Due to his combat experience with battle droids, Rex was familiar with robolobotomy. While he was trained to wield firearms, Rex was also proficient in unarmed combat.[16] Besides fighting droids and Imperials, Rex also had some experience dealing with the spider-like krykna which lived near Chopper Base, the Phoenix rebel base on Atollon.[78] Rex also knew how to handle machinery and could fly a Y-wing starfighter.[80]

Rex put his combat and technical skills to good use during the successful rebel operation to infiltrate and launch the Dome during the Liberation of Lothal.[90]

During the Clone Wars, Rex wore both phase I and phase II clone trooper armor with blue markings, and was known for having Jaig Eyes on his helmet. Rex used dual DC-17 blaster pistols in combat during the Clone Wars and continued to use them after the fall of the Republic.

According to the The Clone Wars film DVD commentary, the series' creators originally intended to use the Legends clone trooper Alpha-17 of the Star Wars: Republiccomic book series as the series' prime clone character. However, Star Wars creator George Lucas objected to Alpha's inclusion as it would have made too much of an alliteration (Anakin, Artoo, Ahsoka and now Alpha), leading to the conception of Rex.[92]

Before the cancellation of The Clone Wars series, Brent Friedman wrote scripts for a four-episode arc starring Rex and R2-D2. A heated rivalry between the Clone Army's general ground forces and pilots and their droids would ultimately result in Rex flying a starfighter with R2 as his copilot. They would crash and be stranded together on one of the moons of Ryloth,[93] where most of the episodes would take place.[94] Rex and R2 reprogrammed a B2 super battle droid that they would grow attached to,[95] and at some point Rex was injured.[96]

Dave Filoni speculated that Rex might be one of the members of the Endor strike team from the 1983 film Star Wars: Episode VI Return of the Jedi. "I really do think that Rex is that guy on Endor", he said, "I really do. Why else is there a bearded old guy on Endor, Tano? Why? It makes no sense. If you don't want that to happen, do you know what that means? I'm gonna make that happen, I'm getting like Palpatine, I'm getting power crazy".[97] In Legends, the character was identified as Nik Sant.[98] The Rebels series finale, which aired on March 5, 2018, confirmed that Rex did fight in the Battle of Endor, though it did not confirm whether he and Sant were the same character.[90] Six months after the episode's airing, Filoni revealed in an interview with IGN he ultimately choose to not canonize the theory because he felt that laying down an already established character prior to his coming to Star Wars wasn't correct, adding that Rex could have been present at Endor and not be Sant, even though some fans could choose to believe that Rex and Sant are the same individual while other choose to not do so.[99]